package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增分类
     * @param categoryDTO
     */
    @Override
    public void save(CategoryDTO categoryDTO) {
        //新增信息拷贝
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        //默认状态0
        category.setStatus(StatusConstant.DISABLE);
        //创建时间，修改时间，创建人，修改人
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.insert(category);
    }

    /**
     * 分类分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {

        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> page=categoryMapper.pageQuery(categoryPageQueryDTO);

        Long total=page.getTotal();
        List<Category> records=page.getResult();

        return new PageResult(total,records);
    }

    /**
     * 启用禁用分类
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category=new Category();
        category.setStatus(status);
        category.setId(id);
        categoryMapper.update(category);
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.update(category);
    }

    /**
     * 根据id删除分类
     * @param id
     */
    @Override
    public void delete(Long id) {
        {
            //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
            Integer count = dishMapper.countByCategoryId(id);
            if(count > 0){
                //当前分类下有菜品，不能删除
                throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
            }

            //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
            count = setmealMapper.countByCategoryId(id);
            if(count > 0){
                //当前分类下有菜品，不能删除
                throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
            }

            //删除分类数据
            categoryMapper.delete(id);
        }

    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    public List<Category> list(Integer type) {
        return categoryMapper.list(type);
    }
}
